Combine with a summer weight bag in colder conditions or use it alone when nighttime temps are above 60 degrees. Retains up to 80% of radiated body heat. Tougher material on bottom withstands rocky terrain. Can be opened at the bottom and side to allow moisture and heat to escape. Waterproof and windproof. 36"×84" (unpacked), 8"×5.5" (packed), 6.5 oz.
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